大气波导对雷达异常探测影响的评估与试验分析

针对海洋大气波导环境对雷达性能影响的定量评估问题,本文建立的方法将对流层大气中电波传播的抛物型数值方程模式与雷达接收机理论结合起来,通过对雷达电磁波在实际波导环境下的传播损失分布规律进行阈化处理来分析雷达的最大探测距离特征.雷达探测评估的仿真数据显示,该方法能够较方便地评估雷达在大气波导环境下所具有的超视距探测等异常特征,该方法应用于某海域的试验分析中,评估的结果与实际雷达探测效果较为一致,验证了方法的实用性及大气波导环境下雷达的异常探测能力.

Evaluation and Experimental Analysis of Radar Anomalous Detection Influenced by Atmospheric Ducts

This paper addresses the problem of evaluating quantitatively radar capability in marine atmospheric ducts environments. The proposed method combines the parabolic equation model of radio propagation in the troposphere with the radar receiver theory, and the maximum detection range characteristics of radar can be obtained through setting thresholds on the electromagnetic wave propagation loss distribution in actual ducts environments. Simulation data are presented which clearly display that the method is convenient to find out the anomalous characteristics of radar such as Over-The-Horizon detection. The experimental data of Dalian in 2003 is analyzed, the results of the method are coincident with the actual detection of radar, which prove the practicality of this method and the anomalous detection ability of radar in atmospheric ducts environments.